Sizing mechanism



Ma 20, 1930. y DAVls 1,759,480

' SIZING MECHANISM Filed Aug. 21, 1924 3 Sheets-Sheet 1 w INYENTOR ATTOR EY May 20, 1930. K. DAVIS 1,759,480

SIZING MECHANISM Filed Aug. 21, l924 3 Sheets-Sheet 2 M INVENTOR Q,

SIZING MECHANISM Filed Aug. 21. 1924 3 Sheets-Sheet 3 INVENTOR Patented May 20, 1930 time STATES PATNT OFFICE v KENNETH DAVIS, OF'ST. BENEDICT, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO BEMBRANDT PEALE, W. SANDERS DAVIES, AND WILLIAM S. WALLACE,

TRUSTEES SIZING MECHANISM Application filed August 21, 1924. Serial No. 733,328;

The invention relates to a novel sizing or screening machine, and more especially to such a machine having a very efhcient composite motion. f I Objects and advantages of the invention will be set forth in, part hereinafter and in part will beobvious herefrom, or may be learned by practice with the invention, the same being realized and attained by means of-the instrumentalities and combinations pointed out in the appended claims. The invention consists in the novel'parts, constructions, arrangements, combinations and improvements herein shown and described.

The accompanying drawings, referred to herein and constituting a part hereof, illustrate one embodiment of the invention, and I together with the description, serve to explain the principles of the invention.

Of the drawings Fig. 1 is a side elevation of a machine embodying the invention;

- Fig. 2 is a view, partly in elevation and partly in vertical, transverse section, taken on the line 22 of Fig. 1;

Fig. 3 is a .plan, with parts in horizontal elevation, taken on the line 33 of Fig. 1;

Fig. 4 isa fragmentary, vertical section, greatly enlarged, taken on theline 44 of Fig. 3; and

Fig. 5 is a fragmentary, vertical section, also greatly enlarged, taken on the line 5-5 of Fig. 3. p

The invention is directed to providinga machine which will thoroughly and efficiently screen or size broken or divided material very thoroughly and at great speed, that'is with a large and superior output for the machine, and without injuring the material. In this connection the invention is directed to providing a screening or sizing mechanism having a grated or cribriform bed, with the openings of any desired size, and imparting r to such bed a composite and preferably continuous motion such as will efficiently and rapidly separate the different sizes of lumps '01" particles, While permitting a relatively large volume of material to pass over the mechanism, and will operate efliciently in this regard upon a relatively thick, continuous,

and rapidly moving bed. One of the particular adaptations "of the mechanism is to clined. forwardly and downwardly, the all size material flowing on the rear end of the bed, and while upon the bed being subjected to a rlsing and falling motion, preferably a rotary motion with its essential rising and falling component; compounded with that motion is a swinging motion of the bed about a central or other median transverse axis, the finer material passing down through the bed and being conveyed away, and the coarser material being discharged at the forward end of the bed onto any suitable conveying mechanism. 1

' It will be understood that the foregoing general description'and the following detailed description as well are exemplary and explanatory of the invention, but are not restrictive thereof. Other features of the invention, as well as certain of its objects and advantages, will be primarily set forth in connection with the following detailed de: scription of this preferred embodiment.

Referring now in detail to the embodiment of the invention, illustrated by way of example in the accompanying drawings, the separating or sizing bed comprises preferably (especially where the sizing is coarse, that is, where the separation is only of the larger pieces from the great mass of smaller pieces).

a screen having two setsor series of bars.1

and 2, arranged perpendicularly to each other. forated or foraminate metal may be employed when a finer division of the material is required. The screens are preferably attachable to and detachable from the frame of the bed, and are thus interchangeable, so that the separated sizes may be, varied as de- A finer screen, such as one of per-.

sired. Thelscreen Openings thus may be exactly adapted to the size differentiation to be effected or tothe nature or physical condition of the material being operated upon, or to other conditions or purposes. To this end the screen member comprises a frame, carry- .ing the bars 1 and 2, or other screen elements,

which frame is attached to and is detachable from a main bedframe, which latter is connected to the actuating mechanism. As embodied, the bars 1 and 2, or their equivalents,

are riveted or otherwise fixed to the screen.

frame 3, preferably composed of angle iron,

withone'fiange 5 vertically disposed, and

the other fienge4 disposed horizontally and inwardly from the top thereof as 18. best shown in Figs. 4 and 5., TlllS screen frame is supported by, and preferably attached to,

the main bed frame. I

The mam bed frame, as shown, comprises two side reaches 10 and 11, of channel iron with their flanges 12 and 13 and 14 and 15, respectively, preferably extending upwardly. The two end members of this frame comprise two angle bars or beams 16 and 17, connected at-their end to the two side bars 10 and 11, the whole being riveted together.

The interchangeable screen frame'is removably supported upon the main frame in any suitablelmanner, and for this purpose there 'areprovided, alongeither side, a plurality of angle iron brackets '28, with one flange extending beneath and pivoted to, the bottom" face of the web of-the corresponding side channel, and having the: other flange thereof I projecting upwardly. The flange f the screen 'frame'fits within the brackets 23, and

rests upon and is supported by the brackets.

Thisconstruction is best shown in Fig. 5.

At either end, for i the same purpose, bracket plates or fingers 27 are riveted to the vertically-disposed flange 16 of the end angle beam'16, the fingers extending upward- 1y therefrom, so thatthe flange 5 of the angle frame 17 at the opposite end of the i, bed. Thus the screen frame is firmly held i in .p'ositiombut may bequickly removed land another frame with different, sized openings substituted therefor.

i i screen frame 3 fits snugly against the backs of the fingers, and may be bolted thereto, as bestshown in Fig. 4. The same construction is employed also in connectionwith the ment, bearing lugs 28 and 29 are bolted to the underside of each of the side channels 10 andv 11 of the bed main frame, and extend downwardly therefrom, and are preferably located at the central part of each of the side frames. J ournaled in the apertures in hearing brackets 28 and 29 is the'eccentric portion of a crankshaft 30, the concentricends 31 and 32 thereof being"journaled,respectively, in journal blocks 33' and 34, which in turn are carried respectively, by pillars 35 and 36. The shaft is rotated in any suitable manner, as by a beltpulley 37, fixed to the shaft. This mechanism, if-

unaffected by any other mechanism or con-- nection would give a rotat onal movement,

with a rising and falling component, to the sizing or screening bed.

In the present preferred embodiment, and as one feature of the invention, a concurrent and corrrelated swinging movement is im parted-to the bed, andpreferably. about a point at some distance'from the. bed, and I preferably about a point moving with the rising andfalling movement'of the bed.

Thus the effective motion of the bed, in aecordance with one feature of the invention, is

a compound of a rotational rising and falling and a swinging. movement about a traveling axis. This movement very rapidly and yet very gently brings all the various particles of various sizes into contact with the 5 screen or other, separating member, as is necessary for thorough sizlng, and at the same time impels the material relatively rapidly forwardly over the bed, without in anywise sacrificing the thoroughness of the 1 sizing or screening action, but greatly increasmg the volume thereof, and thereby of the" output of the machine.

In the embodied formjof mechanism for effecting the participating swinging com ponent of the bed movement, a pair of vertically-disposed rods 40 and 41 are mounted at or near either side of-the bed,and preferably just above the supporting and actuating crank 30. As shown, these rods are each con nected by transversely-disposed pivot joints 42 and 43 to corresponding bracket lugs 44 and 45, respectively, which are fixed to the transversely disposed .bar 47, which bar is fixed at either end thereof. by .brackets 48 and 49, to the side boards 25 and 26iof the main bed.

Attheir upper ends, respectively, the rods 40 and 41 pass through apertures in a channel:

bar 56, carried upon supports 57jand" 58. Enc-ircling the top ends of the rods 40 and 41, respectively, are helical springs 59 and 60, resting upon the top side of the web of the. channel bar 56, and 'in compression 7 between the bar 56 and washers 62and 63, Y V

respectively, which are held in position bynuts 64 and 65, respectively, screw-threaded on to the top ends of the rods. The apertures through the channel bar 56 will be sufficiently large to permit the slightly oscillating or swinging motion of the rod. The

springs 59 and 60 will regulate and cushion the rising and falling movement of the heavf ily loaded bed, due to 'the rotation of the crank, and will prevent downward slamming thereof. g y

Means are provided for eflecting a swinging movement of the bed about an axis, res1liently movable in a straight line or very'flat arc, the axis being relatively remote from the bed, and while I prefer to utilize these two sets of means in co-operation, either could be used without the other, so far as concerns'mos't features of the invention herein.

In the embodiment of said means, at one side of the machine, inclined frame members and 71, preferably angle bars, are arranged in inverted V form, the lower ends thereof being pivoted to the side channel 11 of the main frame and also if desired to the side board 26'. At their upper ends, both of the bars 70 and 71 are secured together by a plate 76, which is preferably riveted thereto. A cap plate 77 rests upon the abutting top ends of the bars 70 and 71' and the three are riveted together by angle brackets 78 and 79. Riveted to the top face of the plate 77' is a bearing lug 80 having a pivot pin aperture therethrough.

A suitable spring acting member is connected to this structure so as to permit resilient up and down movement of the pivot point, while preventing lateral movement thereof. As embodied, a board or other resilient member 84 has one end thereof carried by and fixed to a suitable supporting bracket 85, fixed to the building wall, this 1 member extending toward the construction just described.

At or near the forward end of the spring board 84 is a bifurcated pivot lug 86,'the pivot lug 80 extending into the recess within it, the two being connected together by a pivot pin 87.

On the opposite side of the machine is a similar construction comprising upwardlyextending angle bars and 91, preferably fixed to the side frame member 10 of the main bed near either end thereof, and also preferably to the side board 25 on that side of the bed. At their upper ends they are riveted together by a plate 96, the cap plate 97 resting on the top thereof, angle brackets 98 and 99 being riveted tothe bars and cap plate. Riveted to the top side of the cap plate97 is a pivot lug 100. A corresponding transversely-resilient positioning device, such as a board or bar 104, is fixed to the wall or other suitable support by brackets 105, and at the forward end thereof it has fixed thereto a bifurcated pivot lug 106, the pivot lug 100 extending into the recess thereof, and the pivot pm 107 passing through the two lugs.

Thus when the crank 30 is rotated and tends to give the separating bed not only its rising and falling movement, but also a rotary movement, the spring boards 84 and 104 will resiliently yieldupwardly and downwardly, but

will hold the top ends of the V frames from transverse movement, and will thereby impart a composite rising and falling and swinging movement to the separatingbed. Thus the entire mass of material is thoroughly loosened and mixed and all the pieces or particles are brought against the screen and grating, thereby insuring complete and thorough sizing, while the swinging component at the same time impels the material forward over the bed, and insures the handling of a large volume of material.

Means for supplying the unsized material to the machine, and for receiving and conveying away therefrom the sized material, are preferably provided, and so far as concerns most features of the invention, these may be of any known or suitable form. As embodied, .and in accordance with one feature of the invention, the material is fed on by gravity tothe upper and rear end of the screen bed. and a chute 120, carried on supports .121 is provided for this purpose. At the forward and lower end of the bed a chute 122, the upper end thereof being carried upon supports 123, which in turn are carried by pillars 124 conducts the over-sized material ,away by gravity to any suitable means of disposal, which may be an endless belt conveyor. The undersized material is received beneath the bed intoa receiver 125, the sides thereof being inclined inwardly and downwardly toward a discharge opening 126, the receiver being supported upon the pillars 124 at one end thereof and upon pillars 127 at the other end thereof. The receiver discharges onto an endless conveyor belt 128. I

From all the foregoing it will be understood that mechanism and means are provided by the invention, realizing the-objects and advantages herein set forth, together with other objects and advantages; and it will be further understood that departures may be made from the details of mechanism herein shown and described, within the scope of T7 falling and swinging movement, about axes which are above and below the bed, and means for resiliently supporting the axis about which the swinging movement takes f place.

2. A sizing mechanism including in combination a perforate sizing bed, eccentric means below the bed for giving it a rotary rising and falling movement, pivoted means above the bed for allowing the bed to swing about a horizontal axis, and resilient supporting means cooperating with the pivot above the bed; l

o. .A sizing mechanism including in com bination a perforate sizing bed, eccentric means just below the bed for giving it a rotary rising and falling movement, means extending above the vbed forallowing the bed to swing about ahorizontal axis located a substantial distance above the bed, and means for cushioning the falling movement of the bed, 7 r

4. A sizing mechanism'including in com: binat-ion a perforate slzing bed, 'eccentrlc means below the'bed for imparting to it a rotary rising and falling movement, and supporting means above the bed, including a horizontally extending resilient arm, for allowing the bed to swing about a horizontal axis above the bed.

Q 5. A sizing mechanism including in come bination a perforate sizing bed, eccentric means below the bed for imparting to ita rotary rising and falling movement, supporting means 'abovethe bed, including a horizontally extendingresilient arm, for allowing the bed to swing about a horizontal axis above thebed, and additional resilient m'eans for cushioning the movement of the ports convergingto a horizontally extending axis above the bed, for allowing the bed to swing about such axis, and mounting means, including resilient elements for taking up the weight of the bed, and for allowing it to rise and fall. i v

8.' A 'sizingmechanism including in combination a perforate sizing bed, and means for imparting acombined rotary and swinging' movement to the bed including means relatively nearthe bed for imparting a r0- tary rising and falling movement to the bed and means for swinging the bed about a movable centrally dis-posed axis located a relatively great distance above the bed;

9; A sizing mechanism including in combination a perforate sizing'bed, and means 60' for imparting a combined rotary and swing- 111g movement to the bed including means rel great distance above the bed and resilient means for controlling the'jmovement of said axis. v v

7 10. A sizing'mechanism including in com bination a perforate sizing bed, means for 7 moving the bed on a revolving axis central lyof and below the bed and means for movin the bed about an-oscillatingaxis above the bed. H I 1 V I a In testimony whereof, I; have signed my name to this specification. A

' KENNETH DAVIS.

atively near the bed for imparting a rotary A rising and falling movement to the bed and means for swinging the bed about a movable centrally disposed axis located a relatively 

